Processor Fan Assemblies; Fan Chassis - IBM pSeries 670 Service Manual

Processor Fan Assemblies

Removal
Attention: The fan controller weighs approximately 5 Kg (11 lb.)
1. Locate the fan assembly to be replaced.
2. Note the state of the fan controller's LEDs.
3. Press the green Start Service button on the UEPO switch.
4. Proceed only if all the fan controller's LEDs go off or the repair has been scheduled (System outage -
EPO off),
5. Verify that all cables are labeled for plug location, and unplug the cables from the fan controller on the
fan assembly.
6. Remove the fan controller (see "Fan Controller" on page 848).
7. Loosen the two knurled captive screws that attach the fan assembly to the enclosure.
8. Pull the fan assembly away from the enclosure opening.
Replacement
1. Position the fan assembly in front of the opening through the spring-loaded doors in the enclosure.
2. Slide the fan assembly into the enclosure opening and tighten the upper and lower fasteners.
3. Replace the fan controller onto the face of the fan assembly.
4. Plug all cables into their correct location in the DCA.
5. Press the white Service Complete button on the UEPO switch to indicate completion of this
procedure.

Fan Chassis

Removal
1. Turn off power as described in "Powering Off and Powering On the System" on page 779.
2. Remove the top two fans. See "Processor Fan Assemblies".
3. Loosen the four retaining screws that attach the fan chassis to the processor subsystem chassis.
4. Pull the fan chassis out of the processor subsystem chassis.
Replacement
Replace in reverse order.
Processor Subsystem Air Filters
Attention: To maintain proper airflow, the air filters (part number 11P3781) must be inspected every six
months and replaced as necessary. To replace the air filters, it is not necessary to remove power from the
system or blower assemblies .
Removal
To remove, grasp finger tabs on the air filter and pull straight out.
Replacement
To remove, slide the air filter into the slot. The filter is keyed to ensure correct orientation.
Chapter 9. Removal and Replacement Procedures
849